Both the primary electrical and the signal interconnection system grounds need to be properly designed and installed to achieve a “noise free” system. Safety ground connections that are loose or corroded may cause hazardous conditions and system noise. Safety of Personnel: By safely channeling fault currents into the ground, proper grounding helps to reduce the risk of electric shock to personnel. Each DISTRIBUTION BOX and controller must be grounded. But here's what they missed: Assuming all metal surfaces conduct equally well (dangerous myth!) These aren't small oversights – they're failures waiting for their spotlight moment. When an arc fault happens, that thin. In the US, grounding and bonding are regulated by the National Electrical Code (NEC), while in the UK and Europe, they are guided by standards issued by the International Electrotechnical Commission (IEC) and national regulations such as BS 7671 (IET Wiring Regulations).